Valving assembly for closure caps



July 27, 1954 D. FRIEND vALvING ASSEMBLY FOR CLOSURE CAPs Filed Aug. 5, 1950 UNITED OFFICE VALVING ASSEMBLY FOR CLOSURE CAPS Dawson Friend, Connersville, Ind., assignor to Stant Manufacturing Company, Connersville, Ind., a corporation of Indiana Application August 3, i950, Serial No. 177,375

s Claims. (ci. 22o-4o) 1 2 The present invention relates to a valving asand the wall I8 to secure said bell and element sembly for closure caps, particularly vehicle together with the outer surface of the bell wall fuel-tank caps; and the invention is primarily abutting the inner surface of the element Il?. concerned with the provision of novel means for A radially-extending wall portion 2U joins the supplying such caps with Valving means for con- 5 neck Il with a perimetrally-continuous, axially trollingpressure conditions within the tank, while extending wall 2I which provides a preferably preventing escape of liquid therefrom as a result Cylindrical inwardly facing surface 22 defining an of surging within the tank, open mouth for said bell. The edge of said wall It has long been recognized that such control 2| is mutilated at a plurality of points to denne is desirable, and various forms of valving means i0 outwardly-extending fingers 23, 23 adapted to coit s for exercising such control are known to the art. Opelate With the Cammed edges 24 0f the dOWIl- My invention resides in details of construction turned lip 35 0f the COIlVeltOIlal filler Deck 26 t0 whereby manufacture of valved closure caps is hOld the CHD in CIOSHS lela'GOD With the end Sul"- facilitated and reduced in cost, primarily by the face 27 of said neck.

provision of a self-contained vali/ing unit so de- A gasket 25 Surrounds the bell neck I'I to bear signed and proportioned that it may be assemagainst the inner surface of the element IU; a bied with a conventional form of non-vaived cap gasket 29 Surrounds said bell neck to bear aeinst to convert the same into a valved cap having al1 the outer surface of the bell wall portion 20; and the advantages or other known forms of valved a spring washer 3o is interposed between said caps. Singe no modification in the Structure 0f 20 gaskets to exert aresilient separating force therethe conventional non-valved cap is required to on and to vurge the peripheral portion of the permit assembly of my novel valving unit theregasket it resiliently against the surface 2l when with, it will be seen that manufacturing is simplithe cap is seated.

ned and reduced in cost by rendering feasible A port 3l in the wail I8 registers with a port standardization on a single form of basic cap con- 32 in the element t0 establish Open COmmUIlistruction for both valved and non-valved units. @ation between the interior of the bell i6 and Further objects of the invention will appear as the `chamber l5; and a port 33, radially outside the description proceeds. the gasket 28, establishes open communication To the accomplishment of the above and rebetween the chamber I5 and the atmosphere.

lated objects, my invention may be embodied in 30 The structure thus far described is usable as a the form illustrated in the accompanying drawnon-valved closure cap.

ings, attention being called to the fact, however, The reference numeral 34 indicates generally that the drawings are illustrative only, and that the housing element of my novel vali/ing unit. change may be made in the specilic construction Said housing element has an end wa1135 provided illustrated and described, so long as the scope o1" 35 with a port 3e, a lower cylindrical wall 3l, and an the appended claims is not violated. upper cylindrical wall 38, said walls 31 and 38 Fig. l is a transverse section through a cap being joined byaseat portion Si! facing the upper constructed in accordance with my invention and open end of the housing. At its upper end, the including a preferred form of my novel valving wall 38 is outwardly turned as at 4G and unit; and 40 downwardly turned as at 4I to provide a Fig. 2 is a similar section taken on a plane lip having an outwardly-facing, peripherallyperpendicular to that of Fig. l and showing the continuous surface 42. The surface 42 conforms valving unit in elevation. in contour and dimensions with the surface 22 of Referring more particularly to the drawings, it the bell wall 2l, so that said lip 4I is snugly rewill be seen that the illustrated cap comprises a ceivable telesccpically in said bell wall where it discoid base element it having an axially-exwill be eriectivelyfrictionally held, a gasket 43 tending peripheral flange Il. A bonet I2, formed being sealingly interposed between the lip porwith a flange i3 which embraces the flange I I and tion 49 and the bell wall portion 2B.

preferably has an inturned extension I4, co- A Valve element 44 is reciprocably mounted in operates with the outer surface of the base elethe housing its for movement into and out of ment to dene a chamber I5. seating engagement with the seat 3B. As shown,

A bell, indicated generally by the reference said valve element is formed with a port 45 therenumeral It, comprises a generally cylindrical through, and carries a gasket 46 formed with a neck I'I closed at its upper end by a transverse corresponding port 4l' therethrough. A spring 48 wall I8; and a rivet I9 penetrates the element I0 55 bears against the upper Surface 0f Said valve ele- 3? ment, the relaxed length of said spring being greater than the depth of said housing above said seat S9. Thus, when the housing 3d is assembled with the bell I6, the spring 43 is coniined between the valve ifiand the bell wall portion 29 and resiliently holds said valve 44 on its seat 39.

In the illustrated embodiment of my invention, the port through the valve lli is controlled by a second valve 49 urged against valve gasket d in closing relation to the port e5, by a spring 59 confined between valve i9 and housing end wall 35.

Ii desired, the housing may be secured against removal from the bell by mutilation of the edges oiwall 2l, as at 5i.

I claim as invention:

l. A closure cap comprising, in combination, a base element, a bell iixed to said base element and having an open mouth facing away from said base element, said cap being provided with means cooperable with a filler neck for holding said cap in closing assembly with such neck, a valve unit including a housing formed to provide a passage therethrough and a seat intermediate the ends of said passage, a valve in said housing and movable into and out of engagement with said seat, and a spring in said housing and bearing on a surface of said valve remote from said seat, said housing being formed to provide, adjacent one end thereof, a terminal lip turned outwardly and `back toward the other end of said housing, said lip presenting an outer perimetral surface conforming in dimensions and contour to thev internal perimetral surface of the mouth of said bell and being telescopically received within the mouth of such bell, said spring being confined between said bell and said valve to press said valve yieldingly against said seat.

2. The invention of claim 1 including a sealing gasket interposed between the outwardly-extending portion of said lip and a substantially parallel wall of said bell.

3, A closure cap comprising, in combination, a base element, a bell xed to said base element and formed to provide an open mouth facing away from said base element vand delined by an inner cylindrical surface, a valve unit including a housing having a periorate bottom wall, a generally cylindrical body; and a terminal lip turned outwardly and back tov-.fard said bottom wall, said lip presenting an external cylindrical surfaoe' contoured dimensioned for, and having, a snug, irictional it within said internal cylindrical surface denning said bell mouth, said housing further being formed to provide a seat facing that end of said housing providing said lip, a valve reciprocably received in said housing for movement into and out of seating engagement with said seat, and acoiled spring bearing on a surface of said valve remote from said seat, said spring having a relaxed length greater than the distance from said seat to said last-named housing end reduced by the axial length of said valve and bearing against a wall of said bell.

4. The invention of claim 3 including a second valve in said housing located between said bottom wall and said seat, said rst-named valve having a port therethrough, and a spring conned between said. bottom wail and said second valve and yieldingly urging said second valve into seating engagement with said rst valve in closing relation to said port.

5. A closure cap comprising a disooid base element having an axially-extending peripheral ange, a bonnet having a skirt embracing said ange, said bonnet and the outer face of said base element defining therebetween a chamber, a generally-cylindrical bell having a reduced, central neck terminating in a transverse end wall, means centrally securing said bell to said base element with said end wall abutting the inner surface of said base clement, said bell providing, at its end opposite said end wall, an open mouth deiined by an axially-extending perimetrally-oontinuous wall, said neck and said perimetrally-continuous wail being joined by a generally radially-extending wall section substantially parallel with said end v ail, a gasket surrounding said neck and abutting the inner surface oi said base element, a gasket surrounding said neck and abutting said radially-extending wall section, an annular spring surrminding said neck, positioned between said gaskets and exerting thereon a resilient separating fore said bell end wall and said base element being provided with registering ports establishing open communication between said chamber and the interior or said bell, said base ele nent beinglprovided with a further `port radially outside said first-named gasket establishing open communication between said chamber and the atmosphere, a valve unit comprising a housing having a transverse perorate bottom wall and provided at its upper end with an outwardly and downwardly turned iip, said lip having a perimetraliy-continuous external surface conforming in dimensions and contour to the internal surface of said perimetrally-oontinuous bell wall and being telescopicaily engaged therewith, a seat in said housing facing away from bottom wall, a valve in said housing reciprocable axially into and out of sealing engagement with said seat, a gasket sealingly engaged between the outwardly-turned portion of said lip and said radially-extending bell wall portion, and a spring confined between said valve and said radially-extending bell wall portion and yieldingly urging said valve into closing engagement with said seat.

6. The closure cap oi ciaim 5 in which said valve is formed with a port therethrough, a second valve disposed in said housing between said bottom wall and said nist-named valve, and a j spring conned between said housing bottom wall and said second. valve and urging said second valve into seating engagement with said firstnamed vaive in closing relation to said lastnamed port. 

